Use After Free in Webkitgtk
CVE-2021-21775
A use-after-free vulnerability exists in the way certain events are processed for ImageLoader objects of Webkit WebKitGTK 2.30.4. A specially crafted web page can lead to a potential information leak and further memory corruption. In order to trigger the vulnerability, a victim must be tricked into visiting a malicious webpage.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.013 (68.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Webkitgtk — versions 2.30.4
- Debian Linux — versions 10.0
- Fedoraproject Fedora — versions 33, 34
- Webkit — versions Webkit WebKitGTK 2.30.4
Weakness classification (CWE)
References
- talosintelligence.com/vulnerability_reports/TALOS-2021-1229 (Technical Description, Exploit, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/07/23/1 (mailing-list, Mailing List)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.debian.org/security/2021/dsa-4945 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2021-21775?
- CVE-2021-21775 is a high-severity vulnerability in Webkitgtk, classified under Use After Free. CVSS score: 8.0/10. Published 2021-07-07.
- How severe is CVE-2021-21775?
- High severity. CVSS v3 base score is 8.0 out of 10.